Mathematics
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矢印から矢印の途中式教えてください😭
n+1
(3) (4k³-1)=4k³ - 1
k=1
n+1
k=1
n+1
n
k=1
2
= 4 { / (n + 1 ( n + 1) + 1}]}³ = (n + 1)
=(n+1)(n+1Xn+2)²-1}
=(n+1){(n+1Xn²+4n+4)-1}
=(n+1)(n³+5n²+8n+3)
10.0+1
2 201
AUTORE
円
TULONS
n
201
2 Ar
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めちゃめちゃ納得です!!!ありがとうございます!